| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 45°F | 69°F | 56°F | 0.8" |
| February | 48°F | 74°F | 60°F | 0.7" |
| March | 54°F | 81°F | 67°F | 0.5" |
| April | 60°F | 88°F | 74°F | 0.2" |
| May | 68°F | 96°F | 83°F | 0.2" |
| June | 79°F | 107°F | 94°F | 0.0" |
| July | 84°F | 108°F | 96°F | 0.9" |
| August | 83°F | 107°F | 94°F | 1.4" |
| September | 77°F | 102°F | 89°F | 0.8" |
| October | 65°F | 92°F | 78°F | 0.2" |
| November | 54°F | 80°F | 66°F | 0.4" |
| December | 45°F | 69°F | 55°F | 0.9" |
| Index | Sunset | Tempe | Arizona |
| Air quality index | 74 | 74 | 57 |
| Pollution index | 4,063,380 | 4,063,380 | 9,766,019 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 50 |
| Days with moderate air quality | 261 |
| Days w/ poor A.Q. for sensitive groups | 42 |
| Days with unhealthy air quality | 2 |
| Pollutant | Total |
| Arsenic | 0.004% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.040% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Maricopa Colony, AZ | 818 | 74 | 48.0% |
| Fountain Hills, AZ | 25,167 | 74 | 48.0% |
| Paradise Valley, AZ | 14,502 | 74 | 48.0% |
| Chandler, AZ | 257,076 | 74 | 48.0% |
| Mesa, AZ | 508,918 | 74 | 48.0% |
| Tempe, AZ | 191,607 | 74 | 48.0% |
| City | Population | Air Quality Index | National Avg. |
| McKinney, TX | 191,197 | 51 | 2.0% |
| Tallahassee, FL | 192,885 | 40 | 20.0% |
| Paradise, NV | 193,150 | 54 | 8.0% |
| Mobile, AL | 189,994 | 42 | 16.0% |
| Shreveport, LA | 189,890 | 39 | 22.0% |
| Tempe, AZ | 191,607 | 74 | 48.0% |
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